[QEMU] osdep: powerpc64 align memory to allow 2MB radix THP page tables

Message ID 20180506072949.12783-1-npiggin@gmail.com
State New
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Series
  • [QEMU] osdep: powerpc64 align memory to allow 2MB radix THP page tables
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Commit Message

Nicholas Piggin May 6, 2018, 7:29 a.m.
This allows KVM with the Book3S radix MMU mode to take advantage of
THP and install larger pages in the partition scope page tables (the
host translation).

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 include/qemu/osdep.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Patch

diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
index 41658060a7..5910682221 100644
--- a/include/qemu/osdep.h
+++ b/include/qemu/osdep.h
@@ -357,7 +357,8 @@  void qemu_anon_ram_free(void *ptr, size_t size);
 #endif
 
 #if defined(__linux__) && \
-    (defined(__x86_64__) || defined(__arm__) || defined(__aarch64__))
+    (defined(__x86_64__) || defined(__arm__) || defined(__aarch64__) \
+     || defined(__powerpc64__))
    /* Use 2 MiB alignment so transparent hugepages can be used by KVM.
       Valgrind does not support alignments larger than 1 MiB,
       therefore we need special code which handles running on Valgrind. */